Client install roles added

roles/lmn_printer/files/linuxmusterLinuxclient7/localUserHelper.py

@@ -0,0 +1,19 @@
+import subprocess
+from linuxmusterLinuxclient7 import logging
+
+def getGroupsOfLocalUser(username):
+    """
+    Get all groups of a local user
+
+    :param username: The username of the user
+    :type username: str
+    :return: Tuple (success, list of groups)
+    :rtype: tuple
+    """
+    try:
+        groups = subprocess.check_output(["id", "-Gnz", username])
+        stringList=[x.decode('utf-8') for x in groups.split(b"\x00")]
+        return True, stringList
+    except Exception as e:
+        logging.warning("Exception when querying groups of user {}, it probaply does not exist".format(username))
+        return False, None